A denial letter tells you what the payer thinks is wrong with the claim. An appeal letter is your answer to that specific claim, and payers reverse the ones they cannot answer. Most failed appeals were never arguments: the same claim resubmitted behind a different cover sheet.
What this covers
- An appeal answers the reason the payer actually gave. Quote it, then name the record line that answers it.
- Send every record with the first appeal. Later levels accept new evidence only for good cause.
- A peer-to-peer is a clinical call, not an appeal, and it does not extend the filing window.
- Diarize from the notice date, and keep proof of the day you filed.
An appeal is an argument, not a request.The denial notice states the payer’s position. Your letter is the rebuttal.
In the HealthCare.gov transparency data for 2024, insurers denied 19 percent of in-network claims, and consumers appealed fewer than 1 percent of those denials. Practices appeal at a much higher rate, and that gap is where the recoverable money sits.
An Appeal Is an Argument, Not a Request
The denial letter is the payer’s position in writing: a reason code, a sentence of justification, often a policy citation. An appeal that answers that sentence with a fact and a source is an argument. One that restates the claim and asks for reconsideration is a request, and requests get filed.
Three questions decide whether a letter is worth sending. What exactly did the payer say? Why is that wrong, with a citation to the record or the policy cited? What do you want done, on which claim, in what amount? A reviewer can act on a letter that answers all three.
Read your draft as the payer’s reviewer. If it does not name the record line that answers the stated reason, it comes back with the same sentence. Written once as a template by denial category, the routine is how denial management scales past the claims one biller can chase.
Read the Notice as a List of What to Prove
Spend the first twenty minutes of an appeal on the notice. Pull out the claim number, the denial reason and code exactly as written, the provision applied, the appeal address and deadline, and the entity deciding the next level.
When an ERISA plan denies a group health claim, the notice has to state the specific reason, cite the plan provision it relied on, describe any material needed to perfect the claim, and give the review procedures and time limits (29 CFR 2560.503-1(g)). If something is missing, ask for it in writing.
| Denial reason | What the appeal proves | What makes it land |
|---|---|---|
| Medical necessity | The record meets the criteria cited | Criteria name and version, then the chart lines |
| No prior authorization | Authorization existed or was not required | Auth number, approval date, who gave it |
| Administrative denial | The claim was filed correctly | Acceptance report, eligibility response, COB order |
| Coding or bundling edit | The combination is separately payable | Operative note language, modifier rules |
A denial caused by a clerical error is not an appeal. Units, dates, a dropped modifier, a diagnosis pointer: Noridian’s DME redetermination checklist sends suppliers down the reopening path for those, a correction to the record that keeps the appeal window clear for a disputed decision.
The Six Blocks of a Letter That Gets Paid
Bracketed at the top: [payer], [patient name], [member ID], [claim number], [dates of service], [denial date and reference number]. A reviewer locates the claim in seconds or stops looking.
Copy the payer’s reason word for word, with its code. Paraphrasing invites an answer to a reason the payer never gave.
One paragraph per disputed issue: the clinical or contractual fact, its source, the provision the payer cited.
Every attachment by name and page, with the line that matters called out: [operative report, page 2, conservative care documented 11/2025].
One sentence naming the outcome: reprocess [claim number] and pay [amount].
Re: [patient], [member ID], claim [number], DOS [date]. Denial: ‘[verbatim reason]’ ([code]). We appeal because [one fact] is established by [one source]. Enclosed: [attachment list]. We request reprocessing and payment of [amount].
Two pages is the working maximum: one issue per paragraph, no adjectives, no retelling of history the payer already has.
First-Level Appeal, Peer-to-Peer, External Review
A first-level appeal is a written review by someone who did not make the original decision. ERISA sets the floor for group health plans: at least 180 days to file, a reviewer who is not the original decision maker or that person’s subordinate, and a health care professional with relevant training on denials based on medical judgment (29 CFR 2560.503-1(h)).
A peer-to-peer is a clinician-to-clinician call, usually on a prior authorization denial, and it happens before the appeal. UnitedHealthcare’s scheduling form is explicit: the request can only be made before an appeal is submitted, and the decision cannot be changed through that process once an appeal is filed.
CMS guidance for Medicare Advantage treats treating-provider peer-to-peer discussions as evidence gathering, not an appeal level: the coverage decision keeps its full appeal rights, and plans may not obstruct them. Take the call and file the written appeal on schedule.
A peer-to-peer scheduled near your filing deadline does not move the deadline. Submit the written appeal first, note that a call is scheduled, and take it. If the call produces new clinical detail, supplement the appeal in writing.
External review happens outside the payer. On non-grandfathered plans the written request must be filed within four months of the notice or final internal denial, and the independent review organization decides within 45 days, or 72 hours expedited (45 CFR 147.136). A Medicare Advantage plan that affirms a denial on reconsideration sends the case file to the independent review entity (42 CFR 422.590).
The Filing Clock by Payer Type
Deadlines move with the payer and with whether the denial was pre-service or post-service. Two habits prevent most losses: diarize from the date printed on the notice, and put the appeal filing date on the calendar.
| Payer or plan | File within | Decision expected | Next level |
|---|---|---|---|
| Medicare Part A and B | 120 days of the remittance advice | About 60 days | QIC reconsideration within 180 days |
| Medicare Advantage | 60 calendar days of the notice | 30 calendar days, 72 hours expedited | Independent review entity |
| Medicaid managed care | 60 calendar days of the notice date | 30 calendar days | State fair hearing, 90 to 120 days |
| Commercial group health | At least 180 days | 60 days post-service, 30 days pre-service | External review within four months |
Medicare adds a dollar floor at the third level. For calendar year 2026 an administrative law judge hearing requires at least $200 remaining in controversy and judicial review requires $1,960; claims can be aggregated to reach the threshold, and the Office of Medicare Hearings and Appeals is expected to decide within 90 days.
What Gets a Good Appeal Denied
Appeals that fail usually fail on procedure: sound argument, wrong desk, missing element, no proof of when it was sent.
- File with the right entity: redeterminations to the MAC on the notice, reconsiderations to the QIC.
- Include the elements CMS requires: beneficiary name, Medicare number, services with dates, the party’s name.
- Send records with the first appeal. At Medicare levels three and above, new evidence needs good cause.
- Keep proof of filing: the acceptance report, fax confirmation, portal submission ID, delivery date.
- Route clerical errors to a reopening and keep the appeal window for a substantive dispute.
A denial file with a diarized deadline, a complete attachment index and a record of submission forces a decision on the record. Reporting that by payer and by denial category is what denial management solutions covers.
Appeal letters, deadlines and review levels
For Original Medicare, a redetermination goes to the MAC within 120 days of the remittance advice and is decided within about 60 days. A reconsideration goes to the QIC within 180 days of that notice, decided within 60 days. Later levels run on 60-day windows, and a timely request at either of the first two levels stops recoupment.
No. A peer-to-peer is a clinical conversation between your physician and the payer’s medical director, separate from the formal appeal. UnitedHealthcare states that requests can only be made before an appeal is submitted, and that the decision cannot be changed that way once an appeal is filed. Take the call, then file on time.
No. A corrected claim, or reopening, fixes the record: units, dates, a modifier, a diagnosis pointer. An appeal argues that the decision was wrong on the merits. Medicare contractors treat minor clerical errors as reopenings, which keeps your appeal window open for a substantive dispute.
The claim and denial identifiers, the payer’s reason quoted word for word with its code, one paragraph per disputed issue tying your facts to the provision cited, a numbered index of every attachment, the specific action you want, and a named contact with a direct phone number. Two pages is enough.
After the plan’s final internal denial. On non-grandfathered ACA plans you must file the written request within four months of the notice, and the independent review organization decides within 45 days, or 72 hours for an expedited review. The final denial notice must name that organization.
It depends on the payer. Original Medicare moves to the QIC, then to an administrative law judge if at least $200 remains in controversy, then to the Medicare Appeals Council and federal court. Medicare Advantage sends the file to the independent review entity. ERISA leaves external review, then a civil action.
A valid, timely redetermination or reconsideration request stops recoupment, and collection resumes only if no appeal is filed at that level. Recoupment can restart once the case moves to an administrative law judge or higher. Principal and interest collected on an overturned claim are refunded.
The bottom line
An appeal is a written argument against a stated reason, judged by a stranger with a deadline. Quote the denial, attach the record that answers it, and ask for the exact action you want. Payers reverse appeals that are simple to reverse on the record.
How many of last month’s denials are still appealable?
Send us a denial report with the payer reason codes and the notice dates. We will separate what is appealable from what has expired, show you where your practice leaves money, and draft the first two appeal templates with your team.
Request a free denial auditAppeal levels, filing windows and documentation requirements vary by payer, plan and state, and payer policy changes through the year. Confirm the deadline and the address printed on the denial notice before you send anything; this is billing guidance, not legal advice.
